07-14-2013 10:47 AM
My Z500 battery discharging from 25% to 5% with in seconds.... when it reaches 25% drastically it is coming to 5% in seconds... please let me know the solution for this... I have resetted the battery gauge but it doesn't effect anything.... please help me.......
07-15-2013 10:02 AM
The battery discharge rate is too high on that unit. Can you try to update the battery firmware below:
If you still get the same problem, It's most likely that the battery is getting faulty and you will need to contact lenovo on how to go about replacing the battery.
Hope this helps
07-16-2013 05:45 AM
Is this battery firmware update specific to the Z500 model or can it be used for any model in the Z500 series.
I encountered a problem the other day with my Z570. Indicator showed 49%, plugged in and not charging. When I disconnected the AC power the laptop immediately shut down as the battery was drained.
07-16-2013 09:20 AM
The battery firmware upgrade fix is for all Z500 models that are produced before 2013/05/06. It will fix the issue when the battery suddenly stops charging or suddenly drops the charge (i.e. you have enough charge on the battery but unplugging the AC adapter will cause system to power off immediately). Check this Battery Firmware Upgrade for Windows 8
If your model is a Z570, this is most likely a different case as this unit is not listed on the supported models for the battery firmware fix. If the battery doesn't hold the charge like the scenario above, you may need to replace the battery.